Allow Renaming of Posts and Pages

Hi, I normally add to my functions.php file to rename Posts to Articles as per below. However, this stopped working when this plugin is active.

// Rename Posts to Articles
/* ------------------------------------- */
add_action( 'init', 'change_post_object_label' );
function change_post_menu_label() {
    global $menu;
    global $submenu;
    $menu[5][0]                 = 'Articles';
    $submenu['edit.php'][5][0]  = 'All Articles';
    $submenu['edit.php'][10][0] = 'Add New Article';
    $submenu['edit.php'][16][0] = 'Artical Tags';
    echo '';
}
 
add_action( 'admin_menu', 'change_post_menu_label' );
function change_post_object_label() {
    global $wp_post_types;
    $labels                     = &$wp_post_types['post']->labels;
    $labels->name="Articles";
    $labels->singular_name="Article";
    $labels->add_new            = 'Add New Article';
    $labels->add_new_item       = 'Add New Article';
    $labels->edit_item          = 'Edit Article';
    $labels->new_item           = 'Article';
    $labels->view_item          = 'View Article';
    $labels->search_items="Search Articles";
    $labels->not_found          = 'No articles found';
    $labels->not_found_in_trash="No articles found in Trash";
}
 
add_action( 'admin_bar_menu', 'change_wp_admin_bar', 80 );
function change_wp_admin_bar( $wp_admin_bar ) {
    $new_post_node        = $wp_admin_bar->get_node( 'new-post' );
    $new_post_node->title="Article";              // Change title
    $wp_admin_bar->add_node( $new_post_node );      // Update Node
}
/* ------------------------------------- */

Could you please advise how to get this working again while still using the plugin?